Question 916880
b, base
h, height
A, area of triangle
{{{A=(1/2)bh}}}


Description means, b=14+4h, and A=60.


{{{4h+14=b}}}
{{{4h=b-14}}}
{{{h=(b-14)/4}}}
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{{{(1/2)b((b-14)/4)=A}}}
Solve for b;
substitute for A and evaluate b.